Convert a hex string to SKColor

String+Hex.swift

import UIKit
import SpriteKit

extension String {
    func hexComponents() -> String?[] {
        let code = self
        let offset = code.hasPrefix("#") ? 1 : 0
        let start: String.Index = code.startIndex
        return [
            code[advance(start, offset)..advance(start, offset + 2)],
            code[advance(start, offset + 2)..advance(start, offset + 4)],
            code[advance(start, offset + 4)..advance(start, offset + 6)]
        ]
    }
}

extension SKColor {
    class func fromHexCode(code: String, alpha: Double = 1.0) -> SKColor {
        let rgbValues = code.hexComponents().map {
            (component: String?) -> CGFloat in
            if let hex = component {
                var rgb: CUnsignedInt = 0
                if NSScanner(string: hex).scanHexInt(&rgb) {
                    return CGFloat(rgb) / 255.0
                }
            }
            return 0.0
        }
        return SKColor(red: rgbValues[0], green: rgbValues[1], blue: rgbValues[2], alpha: 1.0)
    }
}